<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>轮播图点击切换</title>
  <style>
    * {
      box-sizing: border-box;
    }

    .slider {
      width: 560px;
      height: 400px;
      overflow: hidden;
    }

    .slider-wrapper {
      width: 100%;
      height: 320px;
    }

    .slider-wrapper img {
      width: 100%;
      height: 100%;
      display: block;
    }

    .slider-footer {
      height: 80px;
      background-color: rgb(100, 67, 68);
      padding: 12px 12px 0 12px;
      position: relative;
    }

    .slider-footer .toggle {
      position: absolute;
      right: 0;
      top: 12px;
      display: flex;
    }

    .slider-footer .toggle button {
      margin-right: 12px;
      width: 28px;
      height: 28px;
      appearance: none;
      border: none;
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      border-radius: 4px;
      cursor: pointer;
    }

    .slider-footer .toggle button:hover {
      background: rgba(255, 255, 255, 0.2);
    }

    .slider-footer p {
      margin: 0;
      color: #fff;
      font-size: 18px;
      margin-bottom: 10px;
    }

    .slider-indicator {
      margin: 0;
      padding: 0;
      list-style: none;
      display: flex;
      align-items: center;
    }

    .slider-indicator li {
      width: 8px;
      height: 8px;
      margin: 4px;
      border-radius: 50%;
      background: #fff;
      opacity: 0.4;
      cursor: pointer;
    }

    .slider-indicator li.active {
      width: 12px;
      height: 12px;
      opacity: 1;
    }
  </style>
</head>

<body>
  <div class="slider">
    <div class="slider-wrapper">
      <img src="./images/slider01.jpg" alt="" />
    </div>
    <div class="slider-footer">
      <p>对人类来说会不会太超前了？</p>
      <ul class="slider-indicator">
        <li id="1"></li>
        <li id="2"></li>
        <li id="3"></li>
        <li id="4"></li>
        <li id="5"></li>
        <li id="6"></li>
        <li id="7"></li>
        <li id="8"></li>
      </ul>
      <div class="toggle">
        <button class="prev">&lt;</button>
        <button class="next">&gt;</button>
      </div>
    </div>
  </div>
  <script>
    // 1. 初始数据
    const sliderData = [
      { url: './images/slider01.jpg', title: '对人类来说会不会太超前了？', color: 'rgb(100, 67, 68)' },
      { url: './images/slider02.jpg', title: '开启剑与雪的黑暗传说！', color: 'rgb(43, 35, 26)' },
      { url: './images/slider03.jpg', title: '真正的jo厨出现了！', color: 'rgb(36, 31, 33)' },
      { url: './images/slider04.jpg', title: '李玉刚：让世界通过B站看到东方大国文化', color: 'rgb(139, 98, 66)' },
      { url: './images/slider05.jpg', title: '快来分享你的寒假日常吧~', color: 'rgb(67, 90, 92)' },
      { url: './images/slider06.jpg', title: '哔哩哔哩小年YEAH', color: 'rgb(166, 131, 143)' },
      { url: './images/slider07.jpg', title: '一站式解决你的电脑配置问题！！！', color: 'rgb(53, 29, 25)' },
      { url: './images/slider08.jpg', title: '谁不想和小猫咪贴贴呢！', color: 'rgb(99, 72, 114)' },
    ]
    //初始化
    let q=0;
    let sit=null
    let s=null
    const img=document.querySelector('img')
    const p=document.querySelector('p')
    const div=document.querySelector('.slider-footer')
    let li=null
    let lileft=null
    const slider=document.querySelector('.slider')
    //处理函数
    function set(){
      s=sliderData[q]
      img.src=s.url
      p.innerText=s.title
      div.style.backgroundColor=s.color
      
    }
    //循环定时器
    sit=setInterval(function(){
      if(q>7)q=0;
      set()
    },750)
    //鼠标移入与移出
    slider.addEventListener('mouseenter',function(){
      clearInterval(sit)
    })

    slider.addEventListener('mouseleave',function(){
      sit=setInterval(function(){
        if(q>7)q=0;
        set()
        li=document.querySelector(`.slider-indicator li:nth-child(${q+1})`)
        lileft=document.querySelector(`.slider-indicator li:nth-child(${q==0?8:q})`)
        lileft.classList.remove('active')
        li.classList.add('active')
        q++
      },750)
    })
    //切换按钮
    const left=document.querySelector('.prev')
    const right=document.querySelector('.next')
    //
    left.addEventListener('click',function(){
      lileft=document.querySelector(`.slider-indicator li:nth-child(${q==0?8:q})`)
      if(q!==0)q=q-2
      if(q<0)q=7
      set()
      li=document.querySelector(`.slider-indicator li:nth-child(${q+1})`)
      lileft.classList.remove('active')
      li.classList.add('active')
      q++
    })
    right.addEventListener('click',function(){
      if(q>7)q=0
      set()
      li=document.querySelector(`.slider-indicator li:nth-child(${q+1})`)
      lileft=document.querySelector(`.slider-indicator li:nth-child(${q==0?8:q})`)
      lileft.classList.remove('active')
      li.classList.add('active')
      q++
    })
    //按钮

  </script>
</body>

</html>